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PROPERTY, PLANT AND EQUIPMENT (Tables) | 12 Months Ended
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Sep. 30, 2025
Property, Plant and Equipment [Abstract] |
Schedule of Property, Plant and Equipment | Depreciation is calculated using the straight-line method over the estimated useful lives of the related assets as follows:
Buildings |  | 4 to 40 years
Building improvements |  | 3 to 20 years
Machinery and equipment |  | 1 to 20 years
Leasehold improvements |  | Lesser of remaining term of the lease or useful life
Software |  | 2 to 10 years
As of September 30, 2025 and September 30, 2024, property, plant and equipment at cost and accumulated depreciation were as follows:
(in thousands) |  | September 30, 2025 |  | September 30, 2024
Land |  | $ | 29,766 |  |  | $ | 29,401 |
Buildings and related improvements |  | 217,894 |  |  | 192,569 |
Machinery and equipment |  | 701,220 |  |  | 596,748 |
Leasehold improvements |  | 22,116 |  |  | 22,814 |
Software |  | 64,371 |  |  | 57,363 |
Construction in progress |  | 107,758 |  |  | 248,128 |
Property, plant and equipment, at cost |  | 1,143,125 |  |  | 1,147,023 |
Accumulated depreciation |  | (548,859) |  |  | (494,930) |
Property, plant and equipment, net |  | $ | 594,266 |  |  | $ | 652,093 |

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- Definition Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 1 -SubTopic 10 -Topic 360 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482099/360-10-50-1 + Details
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